Pump



E. L. KILBOURN ETAL PUMP Filed May 12, 1965 Sheefi 1 Sheets- M 4r mwww N .5

an Q uh Uite 3,367,273 Patented Feb. 6, 1968 3,367,278 PUMP Eugene L. Kilhourn, Marengo Township, Caihonn Conn-- ty, Robert E. Buckner, Battle Qreek, and Norman Kloetwyk, Marshall, Mich, assignors to Sr. -1. Leggitt Company, Marshall, Mich, a corporation: of Michigan Filed May 12, 1955, er. No. 455,258 9 Claims. (til. 11433-173) This invention relates to a galley pump and more particularly relates to a galley p ump including a flow control valve actuable by the pump handle which pump is capable of alternatively controlling a flow of externally pressurized water or pumping from a supply of water located therebelow.

Manually actuable galley pumps are used in relatively large numbers in boats, travel trailers or the like. Such pumps are generally mounted adjacent a sink and pump water from a storage tank located therebelow on the boat, trailer or the like. These galley pumps are often of the conventional moveable wall type, either piston or diaphragm, wherein reciprocation of a pump handle causes the Water to be lifted from the storage tank and fed out of a spout on the pump. While such arrangement is otherwise satisfactory, connection to a pressure producing, exterior source, such as a municipal water system or other supply having a net pressure head, is often desired when it is available such as, for example, When the boat is clocked in a marina or when the trailer is installed in a trailer park.

Prior galley pumps while capable of pumping water from a storage tank at ambient pressure have not, insofar as we are aware, been capable of controlling the flow of water delivered thereto at a pressure above atmospheric pressure. Thus, the desirable use, when available, of water under a net pressure head has necessitated the addition of supplementary control valving, often comprising a separate faucet mounted adjacent the sink and connected by additional piping to said exterior pressurized water source. Hence, two fixtures, the faucet and the pump, each with its oWn piping are required in such an arrangement in order that both the storage tank and a pressurized exterior source may be used. In addition to the disadvantageous extra installation and maintenance expense caused by duplication of fixtures and plumbing, the added faucet takes valuable room in the already generally crowded sink area.

Previous installations of a somewhat improved type have contemplated insertion of a conventional manually actuable on-off valve in a conduit between the exterior water source and the pump spout to eliminate the need for a separate faucet spout. The valve may be placed away from the crowded sink area such as in a cabinet therebelow, generally however, becoming inconvenient to use when so located. Since in either case, drawing of water at the sink requires the alternative manipulation of two controls, the pump handle and the valve handle, the user is required to make an additional mental effort required to select and actuate the control capable of delivering the required water. Moreover, addition of water to the storage tank from an exterior source requires extra facilities not hereinabove discussed.

Accordingly, the objects and purposes of this invention include:

(1) To provide a galley pump which is capable of pumping water when connected to a storage tank substantially under atmospheric pressure and alternatively capable of acting as a variable flow control valve when fed with water under greater than ambient pressure.

(2) To provide a galley pump, as aforesaid, which is particularly adapted for use in boats, trailers and the like as well as other installations which may require Water supply alternately through a pump and valve.

(3) To provide a galley pump, as aforesaid, automaticaliy capable of acting as either a pump or a flow control valve as required by the pressure characteristic of water supply connected thereto with no change, modification or adjustment thereof.

(4) To provide a galley pump as aforesaid, which uses the same manually actuable handle either to pump water from a storage tank at ambient pressure or to control flow of water under a net pressure head in which the handle position at the end of the output pump stroke corresponds to the closed position of the flow control valve so that the normal at rest position of said handle is the same for both modes of operation, and which requires less mental effort to use than previous systems utilizing separate pump and pressure flow control valve handles.

(5) To provide a galley pump, as aforesaid, which incorporates a pump section which is of a substantially conventional and reliable general type, which is capable of inexpensive and reliable construction, in which only a few extra parts are required to provide pressurized flow control which extra parts are simply and economically constructed and assembled and hence need result in little or no increase in manufacturing expense and selling price, and which will require little or no added maintenance or maintenance knowledge than a conventional galley pump.

(6) To provide a galley pump, as aforesaid, which can be made of a wide variety of materials including plastics and the like, which is generally noncritical in its dimensions, in which machining has been minimized and which can be readily produced either in large numbers or individually.

(7) To provide a galley pump as aforesaid which is quickly and easily installable and which requires no more installation effort or knowledge than a conventional galley pump.

Other objects and purposes of this invention will be apparent to persons acquainted with apparatus of this general type upon reading the following specification and inspecting the accompanying drawings.

In the drawings:

FIGURE 1 is an exploded oblique view of a galley pump embodying the invention.

FIGURE 2 is an enlarged, fragmentary central crosssectional view of the galley pump of FIGURE 1 at rest and connected to an ambient pressure water storage tank.

FIGURE 3 is a view substantially similar to FIGURE 2 but showing the galley pump in a different position and connected to a water source having a net pressure head.

FIGURE 4 is a modified, enlarged fragment of FIG- URE 2.

Certain terminology will be used in the following description for convenience in reference only and will not be limiting. The words upwardly, downwardly, rightwardly and leftwardly will designate directions in the drawing to which reference is made. In addition, the words upwardly and downwardly will indicate directions corresponding to the normal position of use of the galley nump embodying the invention. The words inwardly and outwardly will refer to directions toward and away from, respectively, the geometric center of the device and designated parts thereof. Said terminology will include the words above specifically mentioned, derivatives thereof and words of similar import.

GENERAL DESCRIPTION In general, the objects and purposes of this invention are met by providing a reciprocating pump of a substantially conventional type including a movable wall such as a diaphragm or piston substantially vertically reciprocable in a cylinder by suitable linkage energized by a manually actuable handle. Lift valve means in the piston and a check valve in a depending extension of the cylinder allow water flow only upwardly therethrough to allow the piston to pump water from a storage tank at ambient pressure in a substantially conventional manner. In addition, the present invention provides a valve rod alfixed to and depending from the piston which extends through an an nular valve seat between said cylinder and extension. An enlarged head located above the check valve terminates the lower end of the rod and includes a seal surface which bears on said seat when said piston is raised to prevent water flow into said cylinder even when the check valve is fed with water having a net pressure head.

DETAILED DESCRIPTION The galley pump 11 (FIGURES 1 and 2) embodying the invention includes a stepped cylindrical housng 11. The housing 11 may be of any convenient material and in the particular embodiment shown was molded of recess 21 which normally communicates with the upper end of the cylinder 13. A flange 22, integral with the bottom of the body 19, extends radially beyond the flange 14 of the housing 11. A large resilent O-ring 24 is seated in an annular groove 26 in the bottom face of the flange 22 and bears continuously on the upper face of the flange 14 to seal the upper end of the cylinder 13. Aligned holes 27 and 28 through the flanges 14 and 22. respectively, allow the pump Ill to be fixed to a suitable counter top, not shown, by screws one of which is indicated at 31.

A spout 32 is aflixed, preferably pivotally, to the upper end of the cover 18 for communication with the recess 21. The cover 18 is preferably made of a corrosion resistant metal.

A boss 33 extends from the body 19 along the top of the flange 22. A horizontal opening 34 (FIGURE 2) extends through the boss 33 and into the recess 21 along an axis displaced rightwardly as seen in FIGURE 2 from the central axis of the cylinder 13. A manually actuable handle 36 (FIGURE 1) has an integral spindle 37 at right angles to the lower end thereof. The spindle 37 is snugl but slideably receivable in the opening 34 for pivotally mounting the handle 36 on the cover 13. An O-ring 38 on the spindle 37 seals the outer end of the opening 34. The spindle 37 has a threaded diametral opening 39 therethrough between the O-ring 37 and the end thereof. A lever arm 41 threadedly engages the opening 39 at one end thereof and is thus pivotably supported within the recess 21.

A movable wall, shown for purposes of illustration as a piston 46, is snugly and reciprocably disposed within the cylinder 13. The piston 46 includes a cylindrical body member 47 having a central Opening 48 therethrough. The body member 47 has an annular recess 51 in the bottom face thereof. A plurality, here of preferably evenly circumferentially spaced water openings 49 pass downwardly through the body member 47 just within the perimeter of the annular recess 51. The lower end of the inner circumferential wall of the annular recess 51 is preferably radiall inwardly stepped to form the annular downwardly facing step 52 for receiving the inner circumference of the resilient valve washer 53.

The piston 46 further includes a circular retainer disk 54 below the body part 47 having a central opening 56 normally disposed coaxially with the central opening 2-3 of the body part 47. The retainer disk 54 presses the inner edge portion of the washer 5'3 firmly and upwardly against the step 52. A plurality, here four, of preferably evenly circumferentially spaced water openings 55 through the disk 54 are coverable by the radially outer portion of the washer 53. The disk 54, the washer 53 and the body member 47 coact to define a lift valve generally indicated at 56 for allowing upward water flow therethrough but preventing downward return of water therethrough.

The lower perimeter of the body part 47 is radially reduced and with the adjacent outer portion of the disk defines an annular groove 57 therebetween. A conventional V-section seal ring 58 is disposed in the groove 57 for snugly but slideably contacting the wall of the cylinder 13 at least for preventing downward liquid flow therepast. The body member 47 and disk 54 are preferably plastic, for example Delrin, while the washer 53 and ring 58 are preferably rubber. A rod 61 extends through the central openings 56 and 48 and has an externally threaded upper end 62 for engaging the internally threaded lower end of an upstanding connector block 63 and bearing on the upper face of the body 47. The body member 47 and disk 54 are held firmly together, with the washer 53 and seal ring 58 sandwiched therebetween, between the bottom end of the block 63 and a preferably integral shoulder 64 on the rod 61 intermediate the ends thereof. The upper end of the block 63 and the free end of the lever arm 41 are spaced and pivotally connected through a parallel pair of link plates 66 held thereto by cotter pins 67. Thus, the connector block 63 acts through the link plates 66 to maintain the spindle 37 properly axially positioned in the cover 18 and acts with the lever arm 41 and handle 36 to reciprocate the piston 46 in the cylinder 13.

The housing 11 includes a cylindrical extension 71 of reduced diameter which depends from and is preferably integral with the upper portion 12. The extension 71 includes a passage 72 coaxial with the cylinder 13. The passage 72 communicates with the cylinder 13 through a downwardly divergent, frustoconical valve seat 73. If desired, an insert, not shown, may be used to define the seat 73, such insert being readily removable in the event of wear thereon. The rod 61 extends downwardly and loosely through the valve seat 73 terminating at its lower end in an enlarged head 74. A screw slot 76 in the preferably rounded lower face of the head 74 facilitates threading the rod 61 into the block 63. The upper surface of the head 74 is conically shaped to define a seal surface 77 which corresponds closely to the valve seal 73. The seal surface 77 radially clears the walls of the passage 72 below the seat 73 but interferes with the seat 73 to form a seal therewith when the piston 46 and hence rod 61 are in their uppermost position. The seat 73 and seal surface 77 form the basic elements of the flow control valve structure generally indicated at 75. When the rod 61 is below its uppermost limit, the seal surface 77 no longer seals against the seat 73 for closing flow control valve 75 and sufficient clearance exists between the head 74 and passage 72 to allow water flow upwardly therepast and into the cylinder 13.

The lower end of the extension 71 is internally threaded for receiving a check valve assembly 81. The check valve assembly 81 includes a ball retainer cage 82 having a ratdial flange 83 at the lower end thereof. A shoulder 84 in the passage 72 faces substantially downwardly and preferably has a shallow downward and inward slope against which the flange 83 substantially continuously rests. Axial openings 86 through the flange 83 near its circumference, communicate with grooves extending upwardly therefrom along the periphery of the cage 82 for allowing water flow along the passage 72 past the cage 82. An externally threaded fitting 87 is threaded into the bottom end of the passage 72 to substantially continuously contact the flange 83 and press same against the shoulder 84 to prevent leakage out of the lower end of the passage 72. The fitting 87 includes an upwardly divergently sloped ball valve seat 39 thereof from which a central opening 91 extends through the bottom of the fitting 87. A ball 92 is disposed in said recess 35 and is urged by gravity against the seat 89. An increase in liquid pressure in the opening 91 over that of the passage 72 lifts the ball 92 from the seat 89 to allow liquid flow through the openings 86 into the passage 72. The cage 82 limits upward travel of the ball 92 and prevents chatter. The lower end of the fitting 87 is adapted by any convenient means such as the ridges 93 shown for connection to a liquid conduit, in the particular embodiment shown being a rubber hose 94. Alternatively, the lower end of the fitting may replace the ridges 93 with other conventional means for engaging a liquid conduit of other conventional types such as a rigid pipe or conventional pipe coupling therefor.

The hose 94 is connected to an outlet fitting 96 at the lower end of a liquid storage tank 97. The tank 97 has an inlet opening 98 preferably near the upper end thereof and which is alternatively vented to the atmosphere (FIG- URE 2) for acting as a storage tank for a supply of liquid 99 or connected to a source S (FIGURE 3) of liquid having a net pressure head in which case the tank acts simply as a bulge in the line between the source S and the fitting or opening 91. The particular tank 97 shown is advantageous since connection thereof to the source S automatically fills and renews the water in said tank for its next use as a storage tank. Moreover, disconnection of the line from the source S automatically causes the inlet 98 to vent the tank 97 to allow its use as a storage tank. However, the galley pump embodying the invention may be fed by means other than the particular tank 97, etc., shown within the invention.

OPERATION The galley pump 1d may be assembled as follows. The spindle 37 is inserted into the opening 34 in the cover 18 and the lever arm 41 is threaded thereinto whereafter the connector block 63 is pivotally afiixed to the free end of the lever arm all by the link plates 66 and cotter pins 67. The rod 61 is inserted upward into the passage 72 with its threaded upper end extending into the cylinder 13. The piston 46 is preassembled and placed on the upper end of the rod 61. The cover 18 is brought sufficiently close to the housing 11 that rotation of the head 74, such as by a screw driver inserted upwardly into the passage 72, will thread the rod 61 into the block 63. Thereafter, the cover 18 is aifixed to the housing 11 by the screws 17. Assembly is completed by installing the check valve 81. Installing the pump 10 in a counter top and connection to the tank 97 have been discussed hereinabove and require no further comment. When the tank 97 contains water and is vented (FIGURE 2) for use as a storage tank oscillation of the handle 36 of the galley pump 10 causes the pump 10 to pump water from the storage tank 97 out the spout 32. More specifically, with the piston 46 and parts associated therewith in their uppermost or rest position shown in FIGURE 2, pumping may be initiated by suitable pivotable, in more detail, counterclockwise movement of the handle 36 (FIGURE 2) moves the piston 46 downwardly and thereby opens the flow control valve 75. Since the check valve 81 is closed, the pressure on the fluid, usually water, but could be air on the first pump strokes below the piston 46, increases to allow upward fluid flow through the valve 50 in the piston 46. Return (clockwise as seen in FIGURE 2) movement of the handle 36 moves the piston 46 upwardly and drops the pressure in the cylinder 13 under said piston below ambient pressure to close the valve 50 and open the check valve 81. Continued repetition of the abovementioned pumping cycle results in a flow of Water from the spout 32 upon each up-stroke of the piston 46. It will be noted that the flow control valve 75 in no way interferes with the pumping action of the pump 10. It will also be noted at the end of each upward or water output stroke of the piston 46 the handle 36 is returned to its clockwise most or at rest position as determined by seating of the seal surface 77 against the seat 73.

When connected to a source, such as the source S, of water under a net pressure head, the flow control valve prevents flow through the galley pump 10 when closed (FIGURE 2) by assumption of the clockwise most or at rest position by the handle 36. Counter-clockwise movement of the pump handle 36 away from its at rest position of FIGURE 2 opens the flow control valve 75 to gradually increases flow from zero to a maximum value, the valves 59 and 81 automatically opening, as seen in FIGURE 3, in the presence of a net-positive pressure therebelow. The flow control valve 75 preferably maintain its position like a conventional faucet, until the handle 36 is manually actuated to change its setting due at least in part to friction between the seal ring '58 on the piston 46 (FIGURE 2) and the cylinder 13. Although friction tends to maintain the rod 61 in any given position 36, which friction is not the primary means by which the flow control valve 75 is maintained tightly closed. The flow control valve 75 is in the presence of a net positive fluid pressure therebelow maintained tightly closed not only by frictional forces as mentioned above but also by said pressure which urges the seal surface 77 very tightly against the seat 73 in the manner of a hydraulic ram, increased water pressure from the source S more tightly closing the flow control valve 75.

The galley pump 10 may be used to pump or control the flow of substantially any liquid, although it is believed that most commonly the liquid will be water.

If desired, at least one of the surfaces 73 and 77 may be made relatively soft and resilient in order to positively insure full contact between said surfaces, particularly under diflicult operating conditions. This may be accomplished, for example, by careful choice of the material of the housing 11 and/ or valve rod, at least in the region of the respective seating surfaces. Such might also be accomplished by coating at least one of the surfaces 73 and 77 with a relatively thin layer of resilient material such as rubber or the like.

MODIFICATION FIGURE 4 illustrates a modification of the valve structure 75 of FIGURES 1, 2 and 3. The modified valve structure 101 of FIGURE 4 includes an annular seal member, preferably a conventional resilient O-ring 102, which provides a leakproof seal despite minor inaccuracies or imperfections in its seat and is, further, a reliable, economical and readily replaceable sealing element.

The modified valve structure 101 is particularly advantageous in that it is free of any tendency to water hammer, a common problem in previous valves using O-rings as one of the valve elements in which rapid oscillaiion of the O-ring against and away from its opposing seat occurs when the valve is partially open. The fluttering of the O ring toward and away from its seat causes the water flow to fluctuate rapidly and creates annoying noise and vibration. Water hammenr is believed due at least in part to the increased velocity and, hence, lowered dynamic pressure of water passing the relatively restricted zone between the closely spaced O-ring and seat of the slightly opened valve and an opposing and higher static pressure of water lying between the O-ring and the member on which it is mounted. As a result, the O-ring of the prior valve is pushed against the seat which reverses the pressure conditions thereon causing the O-ring to jump back away from the seat and this oscillation continues while water pressure is supplied to the partially opened valve.

In the following description of the modified valve structure 101, parts thereof corresponding to parts of the valve structure 75 described hereinabove will be referred 7. to by the same reference numerals with the suffix a added thereto. Thus, the valve structure 101 includes a valve rod 61a adopted for connection to a suitable movable wall, such as the piston 46 of FIGURE 2, above the shoulder 64a thereof. The lower end of the valve rod 61a is provided with a head 106 which includes a cylindrical end port-ion 107. A slot 76a capable of receiving a screw driver is provided in the bottom of the end portion 107. The cylindrical end portion 107 is separated from a coaxial, cylindrical intermediate portion 109 of lesser diameter by a coaxial annular groove 111 of approximately hem-icircular cross section. The annular groove 111 is arranged to snugly receive the O-ring 102. The head 107 tapers gradually above the intermediate portion 109 as indicated at 113.

The passage 72a within the extension 71a of the pump housing 11a communicates with the scylinder 13a defined within the housing 11a through a cylindrical opening 116. The diameter of the opening 116 is less than that of the passage 72a thereby defining a substantially radial seat 117 at the upper end of the passage 72a. The radially inner edge of the seat 117 is preferably chamfered as indicated at 11 8.

With the valve 101 closed as shown in FIGURE 4, the intermediate portion 109 of the head 106 lies snugly within but clears the opening 116. In the particular embodiment shown, for example, the diameter of the portion 109 is 0.290 inch and the diameter of the opening 116 is 0.295 inch.

The groove 111, with the O-ring 102, and the cylindrical end portion 107 of head-106 lie below the opening 116 and within the passage 72a. The radical clearance between the wall of the passage 72a and the periphery of the O-ring 102 and portion 107 is substantially greater than the above-mentioned clearance between the open- I ing 116 and portion 109. In the particular embodiment shown, for example, the external diameter of the O-ring 102 and end portion 107 is approximately /8 inch whereas the internal diameter of the passage 72a is about inch, providing a clearance therebetween more than about ten times greater than that between the portion 109 and opening 116.

When the valve 101 is closed, the upper surface of the O-ring rests against the seat 117 preferably including the chamfered portion 118 to seal the upper end of the passage 72a. When the valve 101 is opened to a small degree by moving the rod 611: and, hence, the O-ring 102 downwardly away from the seat 117, water under pressure within the passage 72a will flow upwardly along the passage 72a past the cylindrical end portion 107 I and O-ring 102 and then between the upper portion of the O-ring 102 and the opposed seat 117 and chamfered portion 118. The water then moves through the restricted annular space between the walls of the opening 116 and the intermediate portion 109 and into the chamber 13a. A significant flow will not occur until the O-ring 102 has been moved away from the seat 1 17 by a distance substantially exceeding the clearance between the opening 116 and intermediate portion 109.

Since the annular space between the periphery of the opening-116 and the intermediate portion 109 comprises by far the smallest cross section encountered by the stream, the highest stream velocity and hence lowest dynamic pressure occurs in such annular space. Thus, the pressure of the relatively slowly moving water outside and above the O-ring 102 is substantially the same as the pressure of water which may be trapped between the O-ring 102 and the surface of the groove 111. Thus, the O-ring 102 is stable within the groove 111. Since the O-ring 102 is not induced to vibrate toward and away from the seat 117, no water hammer is produced.

As downward motion of the rod 61a continues, the portion 109 moves out of the hole and is replaced therein by the tapered portion 113 which in response to further downward movement of the rod gradually opens the annular space between the periphery of the opening 116 and the head 106 thereby gradually increasing the water flow. Maximum flow is achieved after the tapered portion 113 has been moved downwardly out of the opening 116.

To shut off the flow of water, the rod 61a is returned to its uppermost position shown. The narrow clearance fit between the portion 109 and the periphery of the opening 116 as the valve approaches its closed position prevents water hammer as described hereinabove with respect to the opening of the valve.

Although particular preferred embodiments of the invention have been described hereinabove for purposes of illustration, it will be apparent that variations or modifications thereof which lie within the scope of the appended claims are fully contemplated.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a combined pump and flow control valve construction, the combination comprising:

a cylinder having inlet and outlet openings and a wall reciprocable within said cylinder;

actuating means for reciprocating said wall;

lift valve means associated with said wall for allowing liquid flow from one side of said wall to the other side;

check valve means associated with said cylinder to allow liquid flow theret'hrough in the same flow direction as said lift valve means;

a source of liquid connectible to said cylinder inlet;

separate flow control valve means continuously movable with said wall for controlling the flow of liquid through said cylinder inlet as a function of the position of said wall, said flow control valve means comprising a valve member and a cooperating valve seat, said valve member having a sealing face adapted to sealingly engage the valve seat, the valve seat being disposed between the sealing face and the reciprocable wall;

whereby manipulation of said actuating means opens and closes said flow control valve means and reciprocates said wall.

2. In a galley pump including a flow control valve, the

combination comprising:

a pump housing defining an axially aligned cylinder and a communicating passage, said passage having an inlet opening and said cylinder having an outlet opening;

a piston disposed in said cylinder for reciprocation therewithin;

a manually actuable handle and linkage connecting said handle to said piston for causing reciprocation of said piston upon actuation of said handle;

a lift valve in said piston for allowing unidirectional flow from said passage through said piston to said outlet;

a check valve disposed between said inlet and said passage for allowing liquid fiow therethrough from said inlet into said passage;

a liquid source connected to said inlet;

a how control valve including a valve rod affixed to said piston and having a head thereon rec-iprocable in said passage, said flow control valve including a seat in said passage between said head and said piston whereby movement of said piston away from said passage moves said head against said seat to close said flow control valve and movement of said piston toward said passage opens said flow control valve.

3. The device defined in claim 2 wherein said source comprises a tank of water under ambient pressure having a maximum water level below the upper end of said cylinder and having a tank outlet below the water level therein connected by conduit means to said pump inlet;

whereby actuation of said handle causes said piston to pump water from said tank through said pump and out said pump outlet.

4. The device defined in claim 2 wherein said source comprises a supply of water having a net pressure head and conduit means for connecting said supply to said pump inlet;

whereby said ttlow control valve may be adjusted by manipulation of said handle to allow liquid flow through said pump housing and out the outlet thereof.

'5. The device defined in claim 2 including a tank for containing water connected to said pump inlet, said tank having at least one inlet opening adapted for alternate connection to both a pressure source and to an ambient pressure zone;

whereby actuation of said handle controls water flow through said pump when said tank is pressurized and pumps water from said tank when said tank contains water under ambient pressure.

6. The device defined in claim 1 wherein:

said check valve means is disposed in a passage between said source and said cylinder;

said check valve means comprises an annular fitting disposed in said passage and having an upwardly facing valve seat, a ball cage having a downwardly opening ball recess communicating with said seat, at least one longitudinal slot in the periphery of said ball cage for allowing liquid flow along said passage past said ball cage and a ball in said recess capable of limited movement radially and longitudinally therewithin suificient to enable removal of said ball from a normal position on said seat for opening said check valve.

7. The device defined in claim 1, including rod means fixedly connecting said valve member to said wall for reciprocation therewith.

8. In a combined pump and flow control valve construction, the combination comprising:

a cylinder having inlet and outlet openings and a wall reciprocable with said cylinder;

actuating means for reciprocating said wall;

lift valve means associated with said Wall for allowing liquid flow from one side of said wall to the other side;

check valve means associated with said cylinder to allow liquid flow therethrough in the same flow direction as said lift valve means;

a source of liquid connectible to said cylinder inlet;

separate flow control valve means continuously movable with said wall for controlling the flow of liquid to said cylinder inlet as a function of the position of said wall, manipulation of said actuating means opening and closing said flow control valve means and reciprocating said wall;

said flow control valve means including means defining a passage along which liquid may flow, a constriction in said passage having a valve seat on one side thereof, a valve rod loosely disposed within and axially reciprocable along said passage, a radially enlarged portion on said valve rod with said enlarged portion being disposed snugly within said constriction when said valve means is closed, a valve seal member on said rod adjacent said portion and axially engageable with said seat for closing said valve means, the radial clearance of said seal member in said passage substantially exceeding the radial clearance of said rod in said constriction whereby as said valve means opens the greatest water velocity and pressure drop will occur adjacent said constriction rather than at said seal member.

9. In a combined pump and flow control valve construction, the combination comprising:

a cylinder having inlet and outlet openings and a wall reciprocal within said cylinder;

actuatingmeans for reciprocating said wall, said actuating means including an arm member mounted for angular oscillation relative to said cylinder;

lift valve means associated with said wall for allowing liquid flow from one side of said wall to the other side;

check valve means associated with said cylinder to allow liquid flow therethrough in the same flow direction as said lift valve means;

a source of said liquid connectible to said cylinder inlet;

separate flow control valve means continuously movable with said wall for controlling the flow of liquid through said cylinder inlet as a function of the position of said wall, said flow control valve means being located downstream of the check valve means and including a fixed valve seat cooperating with a movable valve member, and rod means fixedly connecting said valve member to said wall for reciprocation therewith, movement of said wall to one terminal position causing said valve member to sealingly engage said valve seat;

whereby manipulation of said actuating means opens and closes said flow control valve means and reciprocates said wall.

References Cited UNITED STATES PATENTS 656,306 8/1900 True 222-375 825,868 7/1906 Saiford 103166.5 1,966,321 7/1934 Tullis 230- 2,213,998 9/ 1940 Sifkouitz 25121O 2,309,339 1/1943 -Calaway 230-190 2,353,069 7/1944 Perk-ins 103 l78 2,485,349 10fi1949 Barr 25 1-122 2,489,976 111/1949 Perwas 1032'25 2,792,203 5/ 1957 Olson et a1 25121O 2,812,721 11/ 1957 Coberly 103-230 2,936,099 5/ 1961 Guptill 103--228 3,003,429 10/1961 Petruseivisz 10317 8 DONLEY J. STOCKING, Primary Examiner.

WIIJLIAM L. FRE-EH, Examiner. 

1. IN A COMBINED PUMP AND FLOW CONTROL VALVE CONSTRUCTION, THE COMBINATION COMPRISING: A CYLINDER HAVING INLET AND OUTLET OPENINGS AND A WALL RECIPROCABLE WITHIN SAID CYLINDER; ACTUATING MEANS FOR RECIPROCATING SAID WALL ; LIFT VALVE MEANS ASSOCIATED WITH SAID WALL FOR ALLOWING LIQUID FLOW FROM ONE SIDE OF SAID WALL TO THE OTHER SIDE; CHECK VALVE MEANS ASSOCIATED WITH SAID CYLINDER TO ALLOW LIQUID FLOW THERETHROUGH IN THE SAME FLOW DIRECTION AS SAID LIFT VALVE MEANS; A SOURCE OF LIQUID CONNECTIBLE TO SAID CYLINDER INLET; SEPARATE FLOW CONTROL VALVE MEANS CONTINUOUSLY MOVABLE WITH SAID WALL FOR CONTROLLING THE FLOW OF LIQUID THROUGH SAID CYLINDER INLET AS A FUNCTION OF THE POSITION OF SAID WALL, SAID FLOW CONTROL VALVE MEANS COMPRISING A VALVE MEMBER AND A COOPERATING VALVE SEAT, SAID VALVE MEMBER HAVING A SEALING FACE ADAPTED TO SEALINGLY ENGAGE THE VALVE SEAT, THE VALVE SEAT BEING DISPOSED BETWEEN THE SEALING FACE AND THE RECIPROCABLE WALL; WHEREBY MANIPULATION OF SAID ACTUATING MEANS OPENS AND CLOSES SAID FLOW CONTROL VALVE MEANS AND RECIPROCATES SAID WALL. 